While 3.38 works perfectly on 32-bit systems, users on will require a different set of registry files and a 64-bit signed driver enforcer. If you ever upgrade your hardware, keep in mind that the installation process changes significantly for 64-bit Windows.
Now, follow these step-by-step instructions to install Autodata 3.38 on your Windows 7 32-bit system: autodata 338 install windows 7 32bit